querol y delaado



N -Mo el. ZSheetS -Sheet 1. g E. QUE-ROL Y'DELGAD-O.

TENSION FOR SEWING MACHINES.

-1 Io. 3'77,61 7. v 'PatentdFeb;7, 1888."

I INVENTOR;

ATTORNEY N. PETERS, P huioLilhogl-nphu Wuhingtnn. D. C.

- E. .QUEROL Y D ELGADOI 'TBNSIONI'OR snwmemcfimns, Patented Feb, 7,1888.

(No Model.) 2 Sheets'Sheet 2. 7

ATTORNEYS.

wifrmlsfisi N, PETERS. Phnlol-iliwgmpher. wamn m. n. a

UNITED STATES PATENT OFFICE.

EMILIO UEROL'Y DELGADO, OF BROOKLYN, NEW YORK, AssIeNoR TO HIMSELF, JAMES WRIGHT, ELIAS DURLACH, AND MORRIS BOOKMAN,

ALL OF SAME PLACE.

TENSION FOR SEWING-MACHINES.

SPECIFICATION forming part of Letters Patent No. 377,517, dated February 7, 1888.

Application filed December 3, 1887. Serial No. 256,886. (No morlehl To all whom it may concern: I

Be it known that I, EMILIO QUEROL Y DEL- GADO, a subject of the King of Spain, at present residing in Brooklyn, in the county of Kings and State of New York, have invented details and combinations of the same, as willv be fully described hereinafter,and then pointed out in the claim.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a side elevation of the improvement as applied to a sewing-machine, parts of which are in section. Fig. 2 is a front elevation of the same, and Fig. 3 is a section plan view of the same on the lines a: w of Fig. 2.

O 3 in connection with the tension is fully shown and described in the application above referred to, and hence a further description of the parts not relating to the tension is not 3 5 deemed necessary.

The sewing-machineis provided with a casing, A, on which is hinged the bed-plate A, supporting the arm E,carrying on its front end the head E on which the tension devices H H are located.

The head E is provided with a removable front plate, E, and in the said head E is held to slide the needle-bar F, provided with a lug, F, operating the take-up mechanism G, located 5 above the tension devices H H, also held on the said head E f Each of the tension devices H consists of the horizontal spring-bar H, fastened by one end on the head E and fitting The sewing-machine shown in the drawings,

with its other half-round end into a correspondingly-shaped head, H secured to the head 15 and having a notch, H in its upper edge,throug'h which the needlethread T or T, respectively, enters and then passes between the head H and the half-round end of the spring-bar H. The threads then pass upward to the take-up mechanism G.

The pressure between the head H and the half-round end of the spring-bar H is regulated by a bolt and nut, H, or other means aeting on the said spring-bar H. r 6:)

The operation is as follows: The needle-bar F derives its vertical sliding motion from the main shaft, and in its descent acts on the take up mechanism and carries it downward, thus permitting the lower ends of the threads T and 6 T to follow the needles held on the said needle-bar F. When the latter is on its upward stroke, then the take-up mechanism G exerts a pull on the threads Tand T, which are thus unwound from their respective bobbins and 0 are pulled between the heads H and the halfround ends of the springbars H, thus giving resistance to the threads. The lower ends of the threads T and T are held in the cloth to be sewed, and the tension mechanismsH H prevent atoo rapid unwinding of the threads from their respective bobbins,and also prevent breakage of the threads. r

The tension device H can be nsed single or double, as desired.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent The combination, with the head of a sewingmachine, of the spring-plate H, secured to 8 5 the said head and having its free end halfronnd, and the correspondingly-shaped head H secured to the sewing-machine head and receiving the half-round end of the springplate H, the said head H being provided with the notch H in its upper edge, substantially as shown and described.

EMILIO QUEROL Y DELGADO. Witnesses:

EDGAR TATE, E. M. CLARK. 

